light bulbs that require less electricity than the standard ones
low-energy light bulbs
containers for waste that will be recycled, for example, paper or glass
recycling bins
a change in the average conditions — such as temperature and rainfall — in a region over a long period of time
climate change
it is a way to generate energy from unlimited natural resources that are available with no time limit or come back more quickly than the rate at which they are used.
renewable energy
harmful effects to Earth and its natural systems that happened because of the actions of humans
environmental issues
panels that are designed to absorb the sun's rays as a source of energy for generating electricity or heating
solar panels
a gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space
global warming
