The now-infamous Deepwater Horizon was the same drilling rig that shattered the record for deepest well and discovered the massive Tiber field for BP back in September.
Connection made with the help of this post by John Whitehead of Environmental Economics.
A strategy consultant tries to piece together, bit by bit, how humankind has used natural resources and how we might and should use them in the future. Some scope creep is inevitable.
About Me
- R
- A consultant serving private and public clients in energy, resources and agriculture across multiple geographies.
Subscribe
Site Counter
Labels
agriculture
(137)
climate change
(124)
oil+gas
(120)
power generation
(72)
China
(64)
politics
(64)
food
(63)
Africa
(57)
biofuels
(53)
alternative energy
(45)
cap-and-trade
(45)
Brazil
(33)
GHG emissions
(32)
economic development
(32)
ethanol
(30)
climate legislation
(28)
water
(28)
agricultural productivity
(27)
corn
(27)
blogging
(24)
nuclear
(23)
trade policy
(23)
commodities
(22)
food prices
(22)
natural gas
(22)
BP
(20)
book review
(20)
economic growth
(20)
offshore oil
(20)
natural resources
(19)
resource curse
(19)
crop yields
(18)
speculation
(18)
wind power
(18)
India
(17)
Iran
(17)
Obama
(17)
energy
(17)
solar power
(17)
trade
(17)
coal
(16)
Deepwater Horizon
(15)
oil prices
(15)
subsidies
(15)
environmental regulation
(14)
electric vehicles
(13)
oil refining
(13)
regulation
(13)
Russia
(12)
U.S.
(12)
commodity prices
(12)
economics
(12)
energy efficiency
(12)
food security
(12)
wheat
(12)
M+A
(11)
Mankiw
(11)
energy policy
(11)
international relations
(11)
meat
(11)
shale gas
(11)
Ethiopia
(10)
agricultural subsidies
(10)
carbon tax
(10)
energy independence
(10)
fertilizer
(10)
Exxon
(9)
GM crops
(9)
Nigeria
(9)
Turning Oil Into Salt
(9)
biodiesel
(9)
deforestation
(9)
foreign aid
(9)
livestock
(9)
price volatility
(9)
protectionism
(9)
taxes
(9)
Australia
(8)
Krugman
(8)
Tyler Cowen
(8)
clean coal
(8)
food vs. fuel
(8)
industrial agriculture
(8)
land use
(8)
peak oil
(8)
rare earth metals
(8)
soy
(8)
China in Africa
(7)
David Mackay
(7)
Felix Salmon
(7)
Goldman Sachs
(7)
Michael Pollan
(7)
The Oil Drum
(7)
climate adaptation
(7)
fracking
(7)
green jobs
(7)
hunger
(7)
investment
(7)
oil sands
(7)
oil spill
(7)
unconventional gas
(7)
Bolivia
(6)
Cash for Clunkers
(6)
Congress
(6)
Easterly
(6)
Kenya
(6)
Latin America
(6)
Monsanto
(6)
Pakistan
(6)
Robert Stavins
(6)
Senate
(6)
Somalia
(6)
agricultural research
(6)
algae
(6)
carbon tariffs
(6)
cattle
(6)
democracy
(6)
environmental disaster
(6)
farm lobby
(6)
financial system
(6)
fuel subsidies
(6)
healthcare
(6)
iron ore
(6)
life advice
(6)
organic food
(6)
phosphate fertilizer
(6)
shipping
(6)
tariffs
(6)
trade war
(6)
Ben Casnocha
(5)
CNG
(5)
Canada
(5)
Egypt
(5)
Escaping the Resource Curse
(5)
Food Inc.
(5)
Germany
(5)
Greed Green and Grains
(5)
Japan
(5)
Libya
(5)
Venezuela
(5)
World Bank
(5)
batteries
(5)
carbon sequestration
(5)
cars
(5)
debt
(5)
diamonds
(5)
geothermal
(5)
global climate deal
(5)
grains
(5)
jobs
(5)
mining
(5)
nuclear reactor designs
(5)
nuclear waste
(5)
population
(5)
poverty
(5)
resource nationalism
(5)
seeds
(5)
solar panels
(5)
sugarcane
(5)
transportation fuels
(5)
Amartya Sen
(4)
Argentina
(4)
Chevron
(4)
Climate Progress
(4)
Copenhagen
(4)
Desertec
(4)
Europe
(4)
Fukushima
(4)
Ghana
(4)
Lula
(4)
NOCs
(4)
Open Fuel Standard
(4)
Paul Ehrlich
(4)
Petrobras
(4)
R+D
(4)
Rio Tinto
(4)
Robert McNamara
(4)
What Works in Development
(4)
carbon leakage
(4)
cleantech
(4)
climate science
(4)
climate treaty
(4)
econometrics
(4)
economic policy
(4)
fish
(4)
food trading
(4)
futures
(4)
gas tax
(4)
gasoline
(4)
gold
(4)
government
(4)
jatropha
(4)
lobbying
(4)
macroeconomics
(4)
migration
(4)
nuclear fuel reprocessing
(4)
pirates
(4)
pollution
(4)
rebates
(4)
refined petroleum products
(4)
resource sustainability
(4)
technology
(4)
trading
(4)
unemployment
(4)
war
(4)
Ahead of the Curve
(3)
Cancun
(3)
Conor Clarke
(3)
Dutch disease
(3)
Exelon
(3)
George Monbiot
(3)
Greenland
(3)
IPO
(3)
Iraq
(3)
Kansas
(3)
Middle East
(3)
Morgan Downey
(3)
NIMBY
(3)
PDB
(3)
PHEVs
(3)
Pickens Plan
(3)
RSS feed
(3)
Roger Thurow
(3)
SO2
(3)
Thomas Malthus
(3)
Thomas Schelling
(3)
Tom Friedman
(3)
U.S. Chamber of Commerce
(3)
UK
(3)
Warren Buffett
(3)
Yergin
(3)
Yucca Mountain
(3)
air transport
(3)
animal feed
(3)
climate skepticism
(3)
corruption
(3)
dead zones
(3)
economic recovery
(3)
economic sanctions
(3)
education
(3)
elasticity of demand
(3)
electricity transmission
(3)
externalities
(3)
farming
(3)
federal budget
(3)
financial crisis
(3)
flex-fuel vehicles
(3)
food aid
(3)
food miles
(3)
food riots
(3)
fossil fuels
(3)
fuel choice
(3)
fuel efficiency
(3)
game theory
(3)
glaciers
(3)
inflation
(3)
infrastructure
(3)
land grab
(3)
methanol
(3)
military
(3)
nutrition
(3)
oilfield services
(3)
paleo diet
(3)
political science
(3)
railroads
(3)
randomized evaluations
(3)
religion
(3)
resource scarcity
(3)
risk
(3)
second-generation biofuels
(3)
tragedy of the commons
(3)
urbanization
(3)
weather
(3)
A
(2)
Afghanistan
(2)
Amazon
(2)
Anglo
(2)
April Fool's
(2)
Arctic ice caps
(2)
Bastiat
(2)
Bjorn Lomborg
(2)
Blackstone
(2)
Bonner Associates
(2)
CNOOC
(2)
Cal Newport
(2)
Cape Wind
(2)
Cuba
(2)
Dani Rodrik
(2)
Democratic Republic of Congo
(2)
Duke Energy
(2)
EPA
(2)
Elinor Ostrom
(2)
Energyville
(2)
France
(2)
General Electric
(2)
Gorgon
(2)
Gulf of Mexico
(2)
Haiti
(2)
Horn of Africa
(2)
Howarth study
(2)
IFPRI
(2)
Jeff Bingaman
(2)
Jevons paradox
(2)
Julian Simon
(2)
Kashmir
(2)
Kimberley process
(2)
LNG
(2)
Lockerbie bombing
(2)
Malawi
(2)
McKinsey
(2)
Mozambique
(2)
Nicholas Shaxson
(2)
PG+E
(2)
Parke Wilde
(2)
Persian Gulf
(2)
Petrosal
(2)
Poisoned Wells
(2)
RFS mandate
(2)
Ricardo Hausmann
(2)
Rick Bookstaber
(2)
Roundup Ready
(2)
Sahara
(2)
Saudi Arabia
(2)
Schlumberger
(2)
Scopes Monkey Trial
(2)
Shell
(2)
Singapore
(2)
Sinochem
(2)
South Korea
(2)
Stewart Brand
(2)
Sudan
(2)
T. Boone Pickens
(2)
Tiber
(2)
Uganda
(2)
VC
(2)
Vaclav Smil
(2)
Vietnam
(2)
Warburg Pincus
(2)
Xstrata
(2)
YPF Repsol
(2)
Zimbabwe
(2)
air pollution
(2)
al-Megrahi
(2)
aluminum
(2)
behavioral changes
(2)
behavioral economics
(2)
bio-remediation
(2)
blogiversary
(2)
branding
(2)
bribery
(2)
bubbles
(2)
candlemakers' petition
(2)
cap-and-dividend
(2)
carbon offsets
(2)
career advice
(2)
chemicals
(2)
cocoa
(2)
common resources
(2)
corporate finance
(2)
cotton
(2)
dairy
(2)
data-driven management
(2)
deepwater oil
(2)
deficits
(2)
diesel
(2)
dietary changes
(2)
dollar
(2)
drought
(2)
earthquake
(2)
electric grid
(2)
electricity
(2)
energy security
(2)
entitlements
(2)
environmental causes
(2)
environmental consciousness
(2)
environmental economics
(2)
equity
(2)
experimentalism
(2)
famine
(2)
farm Senators
(2)
flooding
(2)
fugitive methane emissions
(2)
geo-engineering
(2)
global economy
(2)
globalization
(2)
harvest
(2)
history repeats
(2)
hydro power
(2)
infant mortality
(2)
innovation
(2)
insurance
(2)
intellectual discourse
(2)
intellectual honesty
(2)
intermittency
(2)
investment banks
(2)
lifecycle emissions
(2)
lithium
(2)
local food
(2)
local jobs
(2)
lump-sum rebates
(2)
making it rain
(2)
malnutrition
(2)
markets
(2)
mechanization
(2)
metals
(2)
methane
(2)
microeconomics
(2)
microfinance
(2)
mobile phones
(2)
monetary policy
(2)
movies
(2)
nationalization
(2)
non-violence
(2)
nuclear disaster
(2)
oil imports
(2)
oil majors
(2)
onions
(2)
pat on the back
(2)
patent protection
(2)
peak phosphorus
(2)
per capita consumption
(2)
petrochemicals
(2)
pharma
(2)
private equity
(2)
quotas
(2)
rain
(2)
reading
(2)
rent-seeking
(2)
rice
(2)
rising oceans
(2)
smallholder farmers
(2)
space
(2)
spam
(2)
staple crops
(2)
temperature
(2)
the 2000s
(2)
transmission
(2)
transportation costs
(2)
undernourishment
(2)
utilities
(2)
vaccines
(2)
vegetarianism
(2)
10:10
(1)
350 ppm
(1)
50-year farm bill
(1)
9/11
(1)
A Farewell to Alms
(1)
ABCD
(1)
ACCCE
(1)
ADB
(1)
AEP
(1)
API
(1)
AWB
(1)
Abhijit Banerjee
(1)
Acumen Fund
(1)
Addax
(1)
Aidan Hartley
(1)
Al-Shabaab
(1)
Alberta
(1)
Alcoa
(1)
Algeria
(1)
Alstom
(1)
AltaRock
(1)
Amory Lovins
(1)
Amyris
(1)
Angola
(1)
Arab revolutions
(1)
Areva
(1)
Athabasca
(1)
Aurora Biofuels
(1)
Avatar
(1)
Ayatollah Khomeini
(1)
BCG
(1)
BHP
(1)
BPA
(1)
BRACC
(1)
BRIC countries
(1)
Badaracco
(1)
Bagger Vance
(1)
Baker Hughes
(1)
Bakken shale
(1)
Bangladesh
(1)
Barney Frank
(1)
Barrick
(1)
Baseline Scenario
(1)
Bengal famine
(1)
Better Place
(1)
Big Oil
(1)
Bill Gates
(1)
BlackGold
(1)
BlackRock
(1)
Blanche Lincoln
(1)
Blue Hill Farm
(1)
Bobby Jindal
(1)
Bono
(1)
Botswana
(1)
Brookings Institution
(1)
Buenos Aires
(1)
Bulgaria
(1)
Burlington Northern
(1)
CAES
(1)
CDM
(1)
CERA
(1)
CFCs
(1)
CNPC
(1)
CO2
(1)
CSR
(1)
CTL
(1)
Calculated Risk
(1)
California
(1)
Cello Energy
(1)
Chad
(1)
Charles Grassley
(1)
Charles Kenny
(1)
Cheney plan
(1)
Chicago
(1)
Chile
(1)
Chris Blattman
(1)
Christianity
(1)
Chrysler
(1)
ClimateGate
(1)
Collapse
(1)
Colombia
(1)
Copenhagen Consensus
(1)
Cormac Ó Gráda
(1)
Cosan
(1)
D
(1)
DOE
(1)
Dambisa Moyo
(1)
Dan Barber
(1)
Dave Roberts
(1)
David Cameron
(1)
David Roodman
(1)
Davos
(1)
Dhaka
(1)
Dilma Rousseff
(1)
Dominican Republic
(1)
Dow Chemical
(1)
Duoyuan
(1)
E+Co
(1)
E15
(1)
ECX
(1)
EESU
(1)
EEStor
(1)
EP+L
(1)
Edwin Drake
(1)
Emanuel Derman
(1)
Enron
(1)
Ethiopian Airlines
(1)
Evo Morales
(1)
FT
(1)
Fairtrade
(1)
Feedburner
(1)
Fibonacci
(1)
Food Availability Deficit
(1)
Francis Fukuyama
(1)
G8
(1)
GM
(1)
Gabon
(1)
Gandhi
(1)
Gates Foundation
(1)
George W. Bush
(1)
Gini coefficient
(1)
Gladwell
(1)
Glencore
(1)
Glenn Hubbard
(1)
Google
(1)
Grantham
(1)
Greenpeace
(1)
Greg Mortenson
(1)
Gregory Jaczko
(1)
Guinea
(1)
HBS
(1)
Hillary Clinton
(1)
Himalayas
(1)
Hotelling's Law
(1)
Hydrovolts
(1)
I'll believe it when I see it
(1)
IEA
(1)
Ian Hannam
(1)
Iberdrola
(1)
Ikea
(1)
Indonesia
(1)
Inhofe
(1)
Intrade
(1)
Iowa
(1)
Iron Triangle
(1)
Israel
(1)
Italy
(1)
JBS
(1)
JP Morgan
(1)
Jakarta
(1)
Jared Diamond
(1)
Jeffrey Sachs
(1)
Joel Salatin
(1)
John Kerry
(1)
John Manzoni
(1)
Joule Biotechnologies
(1)
Jubilee
(1)
Karachi
(1)
Kenneth the Page
(1)
Kevin's Law
(1)
La Paz
(1)
Lagos
(1)
Lehman
(1)
Lindsey Graham
(1)
Louisiana
(1)
MBA
(1)
MIT
(1)
Maldives
(1)
Marcellus Shale
(1)
Marginal Revolution
(1)
Marshall Plan
(1)
Massachusetts
(1)
Mato Grosso
(1)
Mexico
(1)
Millenium Villages
(1)
Molycorp
(1)
Mongolia
(1)
Mountaineer
(1)
NAFTA
(1)
NOx
(1)
NRC
(1)
NRG
(1)
Napoleon
(1)
Nate Silver
(1)
Nepal
(1)
Netherlands
(1)
New Mexico
(1)
Niger
(1)
Niger Delta
(1)
Nile
(1)
Nobel Prize
(1)
Norman Borlaug
(1)
North Korea
(1)
Nufarm
(1)
Nunaoil
(1)
ONGC
(1)
OPEC
(1)
Ohio
(1)
Omar Bongo
(1)
Ordos
(1)
Orinoco
(1)
Oxfam
(1)
PNM
(1)
PUMA
(1)
Palin
(1)
Panama Canal
(1)
Peru
(1)
Peter Maass
(1)
Petro-Canada
(1)
PetroChina
(1)
Philip LaRocco
(1)
Pilgrim's Pride
(1)
Polyface Farms
(1)
Popular Science
(1)
Prince Charles
(1)
PwC
(1)
Rex Tillerson
(1)
Rio de Janeiro
(1)
Robert F. Kennedy
(1)
Robert Kagan
(1)
Robert Paarlberg
(1)
Robert Rubin
(1)
Roma
(1)
Rortybomb
(1)
Roving Bandit
(1)
Sandia Labs
(1)
Saudi Aramco
(1)
Scotland
(1)
Scott Brown
(1)
Scott Sumner
(1)
Seattle
(1)
Shimon Peres
(1)
Sierra Leone
(1)
Sigg
(1)
Simon Johnson
(1)
Sinopec
(1)
Smith International
(1)
Solix
(1)
Somaliland
(1)
South Africa
(1)
South Asia
(1)
South Dakota
(1)
Spain
(1)
State of the Union
(1)
Steve Chu
(1)
Suncor
(1)
São Tome and Principe
(1)
TEEB
(1)
Tanzania
(1)
Teaching Company
(1)
Ted Kennedy
(1)
Terra
(1)
Texas
(1)
Texas City
(1)
The Atlantic
(1)
The Onion
(1)
The Referendum
(1)
Thomas Crocker
(1)
Thomas Friedman
(1)
Thomas Shannon
(1)
Togo
(1)
Tony Hayward
(1)
Transocean
(1)
Tullow
(1)
U.S. Navy
(1)
US-China collaboration
(1)
United Nations
(1)
Unocal
(1)
Upton Sinclair
(1)
Ute tribe
(1)
Vale
(1)
Valero
(1)
Vandana Shiva
(1)
Vehicle Efficiency Market
(1)
Verenex
(1)
Vestas
(1)
WMD
(1)
WSJ
(1)
WTO
(1)
WWF
(1)
Walmart
(1)
West Virginia
(1)
White House
(1)
Whole Foods
(1)
XTO
(1)
Yanacocha
(1)
Yara
(1)
academia
(1)
accounting
(1)
ad hominem
(1)
administration
(1)
advertising
(1)
agency problems
(1)
agricultural footprint
(1)
agro-chemicals
(1)
airplane crash
(1)
apples
(1)
arbitrage
(1)
asset allocation
(1)
asset pricing
(1)
authoritarianism
(1)
autism
(1)
autocracy
(1)
bankruptcy
(1)
banks
(1)
baseload
(1)
bauxite
(1)
bears
(1)
beer
(1)
belief vs. action
(1)
biodiversity
(1)
biotech
(1)
birds
(1)
blue tech
(1)
board games
(1)
bonuses
(1)
boreholes
(1)
brain drain
(1)
brown streak
(1)
bulk commodities
(1)
business
(1)
business school
(1)
cabbage
(1)
capex
(1)
capital controls
(1)
capital markets
(1)
capital structure
(1)
carbon footprint
(1)
carbon intensity
(1)
carmelina
(1)
cassava
(1)
cats
(1)
cement
(1)
chicken
(1)
chimps
(1)
climate coalitions
(1)
climate debt
(1)
coffee
(1)
coltan
(1)
comments
(1)
commercial fishing
(1)
commodity peaks
(1)
commodity super-cycle
(1)
compensation
(1)
complexity
(1)
consolidation
(1)
contango
(1)
contraception
(1)
copper
(1)
corporate taxes
(1)
crop breeding
(1)
crop protection
(1)
dams
(1)
data centers
(1)
decentralized grid
(1)
demographics
(1)
denialism
(1)
desalination
(1)
diesel engines
(1)
dietary preferences
(1)
diplomacy
(1)
disasters
(1)
disease
(1)
diseconomies of scale
(1)
diversification
(1)
division of wealth
(1)
dogs
(1)
dolphins
(1)
dumping
(1)
ease of doing business
(1)
economic stimulus
(1)
economies of scale
(1)
economy
(1)
ecosystems
(1)
efficient market hypothesis
(1)
elasticity of supply
(1)
electricity distribution
(1)
emerging markets
(1)
energy density
(1)
energy innovation
(1)
energy storage
(1)
engineering and science triumphalism
(1)
environmental damage
(1)
environmental footprint
(1)
environmental recovery
(1)
environmentalism
(1)
equal right to pollute
(1)
erosion
(1)
espionage
(1)
exchange rates
(1)
export bans
(1)
export price parity
(1)
favelas
(1)
feed conversion ratio
(1)
financial innovation
(1)
financial sector
(1)
financial sector returns
(1)
floriculture
(1)
food safety
(1)
food waste
(1)
foreign investment
(1)
forest carbon
(1)
frequency regulation
(1)
gaming
(1)
gas turbines
(1)
gender
(1)
geopolitics
(1)
global economic integration
(1)
global hectares
(1)
good is the enemy of great
(1)
gouging
(1)
grammar
(1)
green revolution
(1)
grit
(1)
guar
(1)
hard decisions
(1)
hedging
(1)
helium
(1)
high-speed rail
(1)
horticulture
(1)
housing prices
(1)
hydrogen
(1)
hydrogen cars
(1)
hypermiling
(1)
hypoxia
(1)
il
(1)
illegal power connections
(1)
import price parity
(1)
income inequality
(1)
indirect land use change
(1)
inefficiency
(1)
international financial system
(1)
internet connections
(1)
investment capital
(1)
irrationality
(1)
jet engines
(1)
land degradation
(1)
land-locked countries
(1)
leapfrogging
(1)
learning
(1)
learning curves
(1)
learning from mistakes
(1)
lessons
(1)
liberal arts
(1)
logistics
(1)
lying
(1)
macho
(1)
management consulting
(1)
manufacturing
(1)
market manipulation
(1)
meat tax
(1)
megacities
(1)
mercantilism
(1)
merchant generators
(1)
microinsurance
(1)
migrant workers
(1)
milestones
(1)
militant Islam
(1)
mobile money
(1)
money
(1)
moon shots
(1)
multi-disciplinary knowledge
(1)
natural disasters
(1)
negative marginal cost
(1)
nickel
(1)
ocean temperature
(1)
oil efficiency
(1)
oil pipelines
(1)
oil production contracts
(1)
oil reserves
(1)
oil tankers
(1)
oil+gas pipelines
(1)
oxen
(1)
ozone
(1)
palm oil
(1)
perennial crops
(1)
personal productivity
(1)
pets
(1)
philanthropy
(1)
philosopher-farmers
(1)
physics
(1)
plastic bags
(1)
plastics
(1)
polls
(1)
population control
(1)
population density
(1)
potash
(1)
potato
(1)
prediction markets
(1)
price
(1)
price collar
(1)
prizes
(1)
problems for later
(1)
progressivism
(1)
protein
(1)
publicity campaigns
(1)
r
(1)
racism
(1)
radiation
(1)
ranchers
(1)
real estate
(1)
recession
(1)
reductionist science
(1)
refrigerators
(1)
regulatory capture
(1)
regulatory revolving door
(1)
remittances
(1)
resource intensity
(1)
resource wars
(1)
resource wealth fund
(1)
retail prices
(1)
retrofits
(1)
rhetoric gap
(1)
rich-world centric
(1)
rinderpest
(1)
risk premium
(1)
role model
(1)
rubber
(1)
safety
(1)
scaling up
(1)
scenario planning
(1)
secession
(1)
shock advertising
(1)
silly ideas
(1)
simplicity
(1)
siting challenges
(1)
slides
(1)
smallpox
(1)
smart grid
(1)
smart growth
(1)
smuggling
(1)
solar thermal
(1)
space-based solar power
(1)
spiders
(1)
spoilage
(1)
sports
(1)
strawberries
(1)
subsidence
(1)
tax loopholes
(1)
tax-deductibility of debt
(1)
technology transfe
(1)
the Energy Game
(1)
the rise of the north
(1)
theater
(1)
thorium
(1)
tipping point
(1)
tires
(1)
torts
(1)
trade barriers
(1)
transparency
(1)
trucking
(1)
tuna
(1)
uncertainty
(1)
underwater cabinet meeting
(1)
underwater phosphorus
(1)
unintended consequences
(1)
urea
(1)
valuation
(1)
value chains
(1)
vehicle-to-grid
(1)
violence
(1)
volcanic ash
(1)
voting
(1)
wastewater
(1)
water bottles
(1)
water purification
(1)
wave power
(1)
weak dollar
(1)
weapons
(1)
wheat rust
(1)
wholesale prices
(1)
wildfires
(1)
wildlife
(1)
win-win
(1)
wind farm wakes
(1)
working
(1)
yield curve
(1)
zero lower bound
(1)
My Shelfari Bookshelf
Copyright People and Resources 2009. The opinions expressed here are mine alone and do not necessarily reflect the views of my current or former employers or colleagues. I make no representations as to the accuracy, completeness, or general validity anything presented in this blog and will not be held liable for any errors, omissions, losses, injuries or damages arising from my postings.
No comments:
Post a Comment