Cultivation facilities will be required to pay a 15 percent excise tax on the wholesale sale of recreational marijuana. Retail purchases of retail marijuana will be subject to state and local sales tax. Retailers will collect sales tax from consumers and remit it to the state.
However, fossil fuels continue to supply nearly 80 percent of world energy use through 2040. Natural gas is the fastest-growing fossil fuel, as global supplies of tight gas, shale gas, and coalbed methane increase.
The bad news is that the majority of renewable energy is hydropower, which is not an exponentially improving technology. The good news is that solar energy is an exponentially improving technology, growing 30% a year in the US. If this continues, solar installations, which just hit one million in Q1 2015, will account for virtually 100% of US electricity production, according to Stanford's Tony Seba.