Not every action taken by humans contributes to climate change. Which of the following human activities does NOT contribute to climate change? 1. Greater use of chemicals that destroy the ozone layer
2. Rises in the number of people driving cars
3. Greater rates of deforestation
4. Larger demand for electricity

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.