When green initiatives are in place and people are actively taking part in the Green Revolution, it does not affect just a local area where those involved happen to live. The issue is global, not dealing with just a country or a city--this issue encompasses the whole world. Sense this is the case, any affect the Green Revolution has will be on a global scale.
If we're talking about the term as it relates to the spread and transfer of technology happening, starting in the mid 20th century, I think that yes, it has helped third world nations. But only to an extent. Most such nations don't have sufficient resources to acquire or develop such technology on their own.
Yes, third world countries are being helped by the green revolution, because part of the green revolution is the advancement of ag methods and how to make higher crop yields. This aspect helps third world countries a lot because they depend on crops for survival, since they only eat what they grow.
Money rules the world. However, everything does have a price. The increased yield on small bits of land is wonderful considering the growing population. Third world countries need to build their own economic foundation before they can be held to the same standards. If tools are donated to the countries so they can have a sustained green land, that would be ideal. The question I pose is what can be done about the watershed from these crops that effect fishing grounds and our drinking water. If we have windmills and solar power whats stopping us from developing new ways to deal with a basic problem?
Green power and green food production are expensive propositions. Third-world countries don't have a lot of money to install expensive solar, wind, or other green power plants. Irrigation systems to help in green food production are also expensive. Coal and other forms of power are much cheaper and easier to obtain. It is inappropriate and crippling to require third-world countries to comply with green initiative while their economies are still overstressed. It would be better to help them grow their economies first, then require them to comply with green initiatives.
I do not believe third-world countries are being helped much by the Green Revolution. Thus far these practices have done more to line the pockets of their creators rather than reduce world hunger. In fact, one could argue these measures were created to make money, not feed more people. Third-world countries may receive more food assistance due to more abundance, but generally I would say they are not helped more than they have been in the past.