Alternative energy sources could curtail the use of fossil fuels. why are they not extensively used?

They have faults. The solar panels are expensive to put in and cause taxes to go up. Wind isn't powerful enough. Technology needs to advance further for other types of power so it can lose many of their faults and become common to use as an alternative to fossil fuels.

Answer(12) judaism; ans(11) all of the above; //ans(10) islands that are artificially created; //ans(9) people accept that the caste system keeps order in society and prevent chaos; ///ans(8),brahman; ans(7) the sikhns; ///ans(6); the non-cooperation movement; asn(5)sporadically grant congressional requests; /ans(4) all of the above; ///ans(3) true; //ans(2) true; //ans(1) false;