what energy source would be the most cost efficient and have the smallest impact on the climate? evidence? ​

Solar energy and wind energy both can be used

Explanation: Solar energy as well as wind energy would be the most preferable energy source for this community.

Solar energy is the energy that is directly derived from the sun and can be transformed into electrical energy. For example, the use of solar panels.

Wind energy is obtained by the natural agent known as wind. In the region where the wind is high, the turbines moves very fast, thereby generating electricity. For example, wind mill.

Thus this two energy sources are less costly and have lesser environmental impacts and they are very precise and is currently rising in the faster rate and with innovative technical upgradation.

conduction, convection, radiation