WASHINGTON — An overwhelming majority of Americans think they can help reduce global warming and are willing to make the sacrifices that are needed, according to a new poll.

After years of controversy, now 71 percent of Americans believe global warming is real, according to a telephone survey of 1,200 people for the advocacy group Environmental Defense. Conducted between Feb. 27 and March 2, the poll has a margin of error of plus or minus 4 percentage points and was conducted by the firm Ayres, McHenry & Associates, which predominantly polls for Republican candidates.

The results include:

-- 53 percent believe warming is caused more by human activity than by normal Earth cycles.

-- 70 percent think the effects of global warming can be reduced.

-- 59 percent think their efforts as individuals can make a difference in global warming.

-- At least 90 percent are willing to take the following steps to reduce greenhouse gas emissions: recycle, turn thermostats down in the winter by 2 degrees, caulk around windows, and combine driving tips when running errands.

-- Between 80 to 90 percent are willing to take these energy-saving actions: wash clothes in cold water, turn down hot water heater temperature, buy energy efficient light bulbs, buy energy efficient appliances, and buy energy efficient cars.

-- 70 percent are willing to drive less, and walk, bike, car-pool or take mass transit.

Source: Associated Press