Read the following text and answer the questions no. 2 and 3.
Countries of the world rely heavily on petroleum, coal and natural gas for their energy sources, There are two major types of energy sources: renewable and non-renewable. Hydrocarbon or fossil fuels are non-renewable sources of energy. Reliance on them poses real big problems. First. fossil fuels such as oll, coal, gas, etc. are finite energy resources and the world eventually will run out of them. Secondly, they will become too expensive in the coming decades and too damaging for the environment. Thirdly, fossil fuels have direct polluting impacts on earth's environment causing global warming. In contrast, renewable energy sources such as wind and solar energy are constantly and naturally replenished and never run out.
Most renewable energy comes either directly or indirectly from the sun . Sunlight or solar energy can be used for heating and lighting homes, for generating electricity and for other commercial and Industrial uses.
Fill in each gap with a suitable word based on the information of the text.
People (a) ---- the world are habituated to using two major types of energy sources. They are (b) --- as renewable and non-renewable. Non-renewable energy sources are very harmful (c) ---- our nature. (d) ---- they are burnt, they produce different types of pollutants which are very (e) ---- for our environment. These kinds of energy sources are (f) ----. With the passage of time. they will be (g) ---- and very expensive. They are also (h) ---- for global warming. (i) ---- the other hand, renewable energy sources are very (j) ---- and environment friendly.