Selected for the CLEAN Collection. Activity description is by the CLEAN reviewers.
Activity takes four to five 45-minute class periods. Computer access is required. ...
Video: Energy 101: Wind Turbines - CLEANLast Updated on 2013-04-16 at 18:17
Video length: 2:16 min.
Selected for the CLEAN Collection. This video provides a simple introduction to wind turbines and how they generate... More »
Global warming is epic, long-term study saysLast Updated on 2013-04-08 at 20:52
(CNN) -- Global warming has propelled Earth's climate from one of its coldest decades since the last ice age to one of its hottest -- in just one century.
A heat spike... More »
Gallery of Greenhouse Gas Molecules - CLEANLast Updated on 2013-03-22 at 20:19
Selected for the CLEAN Collection. This static visualization from Global Warming Art depicts the chemical characteristics of eight greenhouse gas molecules -... More »
Land-use and land-cover changeLast Updated on 2013-03-20 at 23:49
Land-use and land-cover change (LULCC); also known as land change) is a general term for the human modification of Earth's terrestrial surface.... More »