well....concerning with Global warming issues..i would rather more try to look investment in save this planet...i mean we live on it so at least we have to be care about this.
as a sample...lots of woods had been cut..for houses and industrial needs. without see the negative effect from it which make the nature not in balance which can cause lots of disaster..
why don't we try simple like change woods with Bamboo??
it's fast growing plant .. easy growth i think..lots function (the roots, the trees it self etc) ...
we can make it as flooring, beams as construction to replace wood..
Where?? can be in tropical country or even in your own coutry if you can growth bamboo there.
well..it's only my opinion..may it can be 1 of your choices
for sure you can choose other investment what is match with your needs. Good luck