Renewable energy and energy efficiency are two different ways to produce and use energy. Renewable energy is energy produced from sources that are constantly available, like the sun and wind. Energy efficiency is reducing the amount of energy used when producing or using something, like insulating a home so that it uses less energy to heat.
When two organizations partner together on renewable energy and energy efficiency, they are working together to help produce and use energy in a more efficient way. This could mean building bigger solar or wind farms, or finding ways to reduce the amount of energy needed to power a house. Doing this helps everyone save money on their energy bills, helps create jobs, and reduces the amount of greenhouse gases released into the atmosphere.