As governments tighten their belts, it's getting harder for them to pay scientists to monitor the health of the nation's ecosystems. So increasingly, they're turning to citizens who do that kind of work for free. The Environment Report's Ann Dornfeld reports on the growing influence of these "citizen scientists".
"Some dairy farmers are investing in machines that turn gases from cow poop into usable energy. The technology keeps potent climate change gases out of the atmosphere. But ... some California farmers are getting into trouble with air pollution officials."