What happened in environmental science in the 1900?

Who explained why binary stars change colors? What two organ systems are involved in gas exchange? What did the scientific revolution encourage people to do with authority figures? How might being able to think scientifically help you if a modern device stopped working? Was rosalind Franklin married? What is the latitude 30 n and longitude 30 e? What happens when the person's work and heat output is greater than the energy consumed? Who was the founder of the human anatomy? What is the significance of handing down a name in a family from generation to generation? How many electrons are there in the inner shell of hydrogen? Why do rocks have to be in the mantle to change to a metamorphic rock? What action should you take if your vessel breaks down on the water? How many main sections is the brain divided into? Does the amount of positive charge on a proton equals the amount of negative chatge on a neutron? What is a fast moving cold front overtaking a slower warmer front? Does Alaska or Hawaii have the most volcanoes? Is productivity the same as profitability or cost reduction? If Jupiter underwent gravitational collapse what would happen to its rate of rotation? How do you answer positively? What is diminishing when used in a sentence for weather?