Costa Rica aims to cut carbon emissions by 50% by 2050 by emphasizing on:
1) Urban electric trains, lowering taxes on hybrid and electrical transportation and with an efficient road system
2) Having 100% renewable energy by 2030. Currently in most years over 85% of electricity is generated by hydro and with geothermal, solar and wind this reaches over 90%
3) Easing taxes on industries that turn from fossil fuels to biomass and 4) subsidizing credit for agricultural activities that use less water and utilize more organic compost.
You can have more information about this iniciative at the folowing platform:
http://costaricaneutral.cr/index.php?option=com_content&view=article&id=21&Itemid=8