Why good? Because global problems can be approached anywhere. Take carbon emissions: Instead of buying a 25000 $ electric car (1) and saving 12.65 g of CO2 (2) per mile, you can throw 5000 $ (like a pimp) on projects in developing countries, which saves 200 to 500 tons of CO2 emissions, and continue or start driving a shiny metal pimp mobile (3) worth 20000 $.
(1) sends the message that you failed math in school
(3) sends also a message