Q: Does the Amazon produce 20% of the world’s oxygen?
A: No. Scientists estimate the percentage is closer to 6 to 9%, and the Amazon ultimately consumes nearly all of that oxygen itself.
Amazon Doesn’t Produce 20% of Earth’s Oxygen
SciCheck
FactCheck.org’s SciCheck feature focuses exclusively on false and misleading scientific claims that are made by partisans to influence public policy. It was launched in January 2015 with a grant from the Stanton Foundation. The foundation was founded by the late Frank Stanton, president of CBS for 25 years, from 1946 to 1971.
Trump’s False Auto Industry Tweets
President Donald Trump inaccurately tweeted that his fuel efficiency plan would reduce the cost of cars “by more than $3000” and make them “substantially safer.” Even going by his administration’s analysis — which many experts doubt — he inflated the savings and is wrong about car safety.
Williamson Misleads on Children’s Health, Vaccines
In a July 31 television interview, Democratic presidential candidate Marianne Williamson inaccurately implied there might be a connection between vaccines and higher reported rates of childhood chronic diseases. She is correct that reported rates of chronic conditions in kids have increased over the last several decades, but there is no scientific evidence to suggest vaccines are the cause.
When Are Heartbeats Audible During Pregnancy?
Q: When is the human heart fully developed, and when are heartbeats audible during pregnancy?
A: A developing heart has all of its primary structures after about nine weeks of pregnancy. Some forms of ultrasound can detect cardiac activity in an embryo in the sixth week, but a heartbeat wouldn’t be audible until about 10 weeks on a Doppler fetal monitor.
Unpacking Biden’s and Trump’s Big Cancer Promises
On the campaign trail, former Vice President Joe Biden and President Donald Trump have both claimed that a cure to cancer would soon become a reality — if they were elected in 2020. Experts, however, don’t share that degree of optimism.
Does Wind ‘Work’ Without Subsidies?
President Donald Trump has repeatedly questioned the economics of wind energy, saying that wind “doesn’t work” without subsidies. Experts have differing assessments of that. By some metrics, wind power is already competitive with fossil fuels without subsidies. But other measures don’t come to the same conclusion.
Trump Twists Facts in Environmental Speech
In a July 8 speech dedicated to the environment, President Donald Trump made a series of misleading or false statements as he played up the U.S.’s environmental achievements, many of which predate his time as commander-in-chief.
Trump Bungles Climate Change in UK
During a trip to the United Kingdom, President Donald Trump once again expressed skepticism about climate change, making several false or misleading statements in a television interview on “Good Morning Britain” with host Piers Morgan.
Steve King’s Climate Change Rainfall Claims
In a recent town hall, Iowa Rep. Steve King focused on the positives of climate change, inaccurately stating that increased evaporation under higher temperatures will lead to rain in “more and more places” — a result that’s “surely gotta shrink the deserts and expand the green growth.”
The Facts on Fuel Economy Standards
We unpack the complicated and contentious world of fuel economy standards, and explain why some experts aren’t buying some of the Trump administration’s arguments for why stricter Obama-era standards should be loosened.