Scientists advocate for the importance of scientific truth

Scientists and their allies are expected to fill the streets of Washington, D.C., and cities around the globe Saturday for Earth Day's March for Science. In addition to fighting for opportunities for new research, many groups are working to protect existing science. President Trump, who has called global warming a hoax, signed an executive order last month aimed at rolling back Obama-era climate change and environmental policies. Though science still holds an esteemed place in America, there is a gap between what scientists and some citizens think on issues such as climate change, nuclear power, genetically modified foods, human evolution and childhood vaccines