At a very realistic point it is painful to see how we have used technological advances to self-destruct. Huge cities require large spaces where we end up with agriculture, then all the vehicles together not only add up to an enormous source of heat but also emit environmental pollution. It is possible that this could be done in a healthy way, using water as fuel in vehicles, electricity or other technology, but first hydrocarbons were discovered, after the big companies made their investments they were not going to let the use of this so easy to replace, so it is not science that has destroyed us but our own egoism and ambition! Great healthy projects have failed because they were not in the interests of the businessmen, for a sample let's look at Tesla and his free energy project.