Environmental advocates say that changing how much power computers and monitors use in idle mode can cut greenhouse gas emissions without requiring consumers to change their behavior.
When ships reduce their speed they use less fuel, resulting in fewer greenhouse gas emissions and other pollutants; the global shipping industry accounts for nearly 3 percent of global greenhouse gas emissions.
The best way to deal with climate change has been obvious for years: cut greenhouse-gas emissions severely. We haven't done that. In 2010, for example, carbon emissions rose by six per cent - the largest such increase on record.
'Scientific' computer simulations predict global warming based on increased greenhouse gas emissions over time. However, without water's contribution taken into account they omit the largest greenhouse gas from their equations. How can such egregious calculation errors be so blatantly ignored? This is why man-made global warming is 'junk' science.
We have climate change caused by greenhouse gas emissions, mostly from human power and transportation infrastructure. At the same time, we have 2 billion people who live in energy poverty.
I hope that in future Congresses there will reemerge a recognition that climate change is a reality, that our policies to meet our energy needs must also deal responsibly with environmental issues, including the damage caused by greenhouse gas emissions.
We recognize that greenhouse gas emissions are one of the factors affecting climate change.
Health care in the United States is responsible for a tremendous amount of waste and a significant amount of greenhouse gas emissions. For every hospital bed, the American health care system produces about 30 pounds of waste every day; over all, it accounts for about 10 percent of national greenhouse gas emissions.
Factory farming is one of the biggest contributors to the most serious environmental problems. The meat industry causes more greenhouse gas emissions than all the cars, trucks, planes and ships in the world.
The black line is carbon emissions to date. The red line is the status quo - a projection of where emissions will go if no new substantial policy is passed to restrain greenhouse gas emissions.
Coal ash gets far less attention than toxic and greenhouse gas emissions from power plants, but it has created environmental and health problems - every major river in the Southeast has at least one coal ash pond - and continuing legal troubles and large cleanup costs for the authority and other utilities.
Recent warming coincides with rapid growth of human-made greenhouse gases. The observed rapid warming gives urgency to discussions about how to slow greenhouse gas emissions.
Nuclear power can continue to help us reduce our greenhouse gas emissions, but we must do everything we can to make it safer.
It is a simple fact of life on earth that there is going to be no successful mitigation of the climate change problem without a truly global effort. All developing companies or all major developing countries have to be part of that and accept substantial constraints on greenhouse gas emissions.
We can debate this or that aspect of climate change, but the reality is that most people now accept our climate is indeed subject to change as a result of greenhouse gas emissions.
For every $1 billion we invest in public transportation, we create 30,000 jobs, save thousands of dollars a year for each commuter, and dramatically cut greenhouse gas emissions.
Greenhouse gas emissions: Ultimately, stabilisation - at whatever level - requires that annual emissions be brought down to more than 80% below current levels