Which of these human activities is most likely to cause incidences of human skin cancer to increase? a. use of hair spray containing chlorofluorocarbons b. use of solar panels instead of fossil fuels for energy production c. increased consumption of beef, which increases methane production d. burning of plastics in open burn barrels

A. Use of hair spray containing chlorofluorocarbons.

Skin cancer is caused by DNA damage in the skin and mucous membranes from exposure to UVA and UVB rays. The stratospheric ozone layer protects the planet from  harmful  ultraviolet radiation by absorbing it. CFCs (Chlorofluorocarbons) from spray cans, refrigerants and hair sprays causes depletion of the ozone. Ozone loss increases exposure to ultraviolet rays that can increase incidences of human skin cancer.

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport

Carbohydrates,fats and proteins