Governments can promote solutions to climate disruption by

There's few methods how governments can promote solutions for climate disruptions:
1. Strictly regulate carbon dioxide (CO2) and methane as air pollutants 
2. Phaze in carbon taxes or fees
3. Place a cap on total human generated carbon dioxide and methane emissions
4. Increase subsidies to businesses that encourage energy efficient technology

A,) cause a & b are equal & both gives 180°