Through the collection of information and data, we know that all of the following cause negative consequences to the environment except?

a. oil spills.

b. burning fossil fuels.

c. exhaling carbon dioxide.

d. contamination of groundwater.

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?