Four government environmental impact statements in the last five years have concluded that the 1, 700-mile pipeline would present no significant harm to the environment.
Several members of Congress and environmental leaders addressed the earlier rally, which was held at the conclusion to Power Shift '09, a four-day environmental summit organized by the Energy Action Coalition.
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It claimed the oil major and four other companies had violated environmental laws in the largest oil spill in US history.
Four years ago, the Environmental Protection Agency released a doomsday-scenario forecast saying that the amount of electricity consumed by data centers in the U.S. would surge by 100% between the years 2005 and 2010.
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Sixty-four percent of voters surveyed view environmental issues as very or somewhat important, according to the poll.
In 2008, four in 10 car buyers cited environmental factors as important, according to the consumer watchdog Consumer Reports.
Four years ago the WWF, an environmental organisation, commissioned an independent vet's report which concluded that seal clubbing is not cruel if it is properly done by competent and trained professionals.
Beckett Rankine said the location could support a 24-hour airport with four runways and did not have the environmental and logistical issues that came with proposals for an airport in the Thames Estuary.
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Over the past four years, WildEarth Guardians and another environmental group, the Center for Biological Diversity, have filed petitions to add more than a thousand plants and plants to the endangered species list.
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Jones has founded and led four not-for-profit organizations engaged in social and environmental justice.
Kaylen Hendrick, a senior at Florida State University in Tallahassee majoring in environmental studies, is graduating in three years rather than four in order to keep costs and borrowing down.
Nasdaq OMX and four other bourses said they would pressure listed companies into disclosing details of their environmental and social footprints.
ECONOMIST: A limp agreement at the UN��s vaunted environmental summit
In 2000 Iowa's Department of Natural Resources labeled DeCoster a "habitual violator" of environmental laws and banned him from expanding operations in the state for four years because of violations at hog farms he owned.
Nearly four million miles have been driven on Sunoco Green E15, validating the fuel qualities and environmental impact of ethanol as a viable fuel to the millions of NASCAR fans across the country.
"On each of its four sponsons, we would place three fins, " explained Lena Blomqvist, Walenius Wilhelmsen's environmental chief.
We are currently faced with unprecedented environmental and global challenges - population growth - that is expected to level at 9 billion people within four decades, requiring a doubling of food production in three decades, and adequate energy for basic needs.
At the time, new numerical weather models helped forecasters predict extreme weather events two to four days out, said Louis Uccellini, director of the National Oceanic and Atmospheric Administration's National Centers for Environmental Prediction.
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