Cloud-sniffing drones soar over Asia

Researchers track China’s plume of pollution. What effect did Olympic hiatus have?

Climate groups look post-Bush

Expecting a more aggressive approach, they offer advice to the McCain and Obama campaigns.

Western states propose cap-and-trade system for greenhouse gases

The Western Climate Initiative aims to cut the region’s greenhouse-gas emissions by 2020

Can we engineer a cooler earth?

As CO2 mitigation efforts lag, some explore sun-blocking, cloud-forming technologies, and more.

Updated: U.S. public’s thirst for oil prodding Congress to act

With Bush urging new oil exploration in coastal waters, top lawmakers respond with calls to tap the Strategic Petroleum Reserve.

On emissions, G-8 looks past Bush

Its support for halving emissions by 2050 is seen as useful for future negotiations.

California’s plan to cut emissions heavy on mandates

State’s proposed rules are the most sweeping in the US to cut greenhouse gases.

Arctic sea ice melting faster than expected

If the pattern continues, warming effects could reach up to 900 miles inland, melting permafrost

EarthTalk: Winter’s future looks warmer

Some places were colder and got more snow last winter, but that’s in line with today’s models for a warmer climate.

Senate warms to a climate policy

Even though legislation fell to defeat, Friday’s debate marked the first time a majority backed a cap on carbon emissions.

In Cambodia, a case for localizing climate-change research

Researchers know global temperatures are rising. Now scientists from as far away as Finland are studying what that means for the 1 million floating residents of the Tonle Sap Lake.

Carbon cuts: how costly?

Economic harm is top concern in Senate debate over bill.

Warm-up for a global-warming law

Congress to begin work on a bill the next president would be willing to sign.

Unlikely residents: Tropical parrots thrive in US cities

How does your city’s carbon footprint stack up?

A report by the Brookings Institution looks at the 100 largest metro areas in the US, using data on residential energy consumption and highway transportation.

Is water becoming ‘the new oil’?

Population, pollution, and climate put the squeeze on potable supplies – and private companies smell a profit. Others ask: Should water be a human right?

Senate weighs cost of acting, and not acting, on emissions

It doesn't come down to polar bears, it comes down to cost – and while the cost of acting is steep, the cost of inaction appears to be steeper, experts say.

What polar bears get from new protected status

A recovery plan is ensured. But US includes caveats to safeguard oil and gas drilling.

Barcelona floats creative solution to water crisis

This week, it began importing potable water by ship as part of a broader effort to meet needs. Its reservoirs are down to 20 percent capacity.

US lists polar bears as threatened

Wednesday’s designation is the first to list a species due to global warming threats.