Wind power is now comparable in price to fossil fuels, and solar is well on its way, according to a new report that confirms earlier predictions that renewables aren’t just the best option for the environment – they’re unequivocally the smartest long-term investment you can make on energy.

The report, by Bloomberg New Energy Finance, found that in the second half of 2015, the global average cost of onshore wind energy will be $83 per megawatt-hour of electricity (which is down $2 from the first half of the year), and for thin film solar photovoltaics, the cost is $122 per megawatt-hour (down $7 in the past six months).

The costs as they are now, and the steady drops we’ve seen in price over the past six months alone, suggest that as the technology to eke out more and more electricity from solar and wind energy gets ever-more sophisticated, those prices can only continue to fall.