However, the influence of individuals over environment should not be ignored. If we do not that our planet is our home, we will never be able to take care of it. We have to contribute every day to the preservation of nature and environment. For example, always remember to save energy by switching off lamps, computers and everything that we do not use. Our next obligation is to separate waste and throw bulk only in the designated areas. Driving vehicles can also be environment friendly. For example, we have to avoid accelerating the engines too rapidly or using the air conditioning in the country, where it would be better to save energy and simply open the windows.
“to’ is complex because it has different uses – sometimes the hardest words are those that look simple. In truth, the best way to try and get this right is often to “learn phrases” as it is one of those areas that the “rules” are so complex that they end up confusing you. In your example, you cannot say: “global programme to educating people.” If you want a grammatical answer, I’d say that in “global programme to educate people..” “to educate” is an infinitive of the verb, whereas in “the key to making this happen..”. the “to making” is a preposition followed by a verb meaning the “to” bit belongs to the noun and not the verb.