Statewide, solar power’s gradually-then-suddenly rise as a key part of overall electricity generation will add gigawatts of sunshine to the grid in the next three years, and even more by the 2030 target of reducing Colorado utility greenhouse emissions by 80%. Plummeting solar prices mean the cost of generating by the sun is now only 11% of what it was 10 years ago, and with various tax credits, significantly cheaper than building fossil fuel plants. Tri-State Generation, for example, Colorado’s second-largest utility after Xcel, has identified 1,850 megawatts of renewable power to add between 2024 and 2030, replacing high-polluting coal-fired units. More than half of that will be from large solar arrays. TriState has already contracted for the energy from 715 more megawatts of solar to go online by 2024. - Colorado Sun

It feels good to recycle. There’s a certain sense of accomplishment that comes from dutifully sorting soda bottles, plastic bags and yogurt cups from the rest of the garbage. The more plastic you put in that blue bin, the more you’re keeping out of landfills and the oceans, right? Wrong. No matter how meticulous you are in cleaning and separating your plastics, most end up in the trash heap anyway. - Science News

Increasingly bleak forecasts for the Colorado River have for the first time put into action elements of the 2019 Upper Basin drought contingency plan. The 24-month study released in January by the U.S. Bureau of Reclamation, which projects two years of operations at the river’s biggest reservoirs, showed Lake Powell possibly dipping below an elevation of 3,525 feet above sea level in 2022. That elevation was designated as a critical threshold in a 2019 agreement to preserve the ability to produce hydropower at Glen Canyon Dam. - Cronkite News

We’ve learned the saw-toothed pattern of carbon dioxide levels over the past 1 million years. It has shot swiftly up during climbs to past warm intervals like the climate of today and ramped slowly down into the long ice ages in between. We can also see the sharp recent increase in carbon dioxide that humans have caused, mainly by burning fossil fuels for energy. The graph used to show this jump is arguably the most iconic figure in climate science.   To me, it’s long been the most powerful illustration of climate change’s danger. At a glance, it shows how huge a departure we’ve made from normal.  - Washington Post 

Kauai Island Utility Cooperative and AES Corp. have executed and filed a power purchase agreement with Hawaii regulators to develop a solar-powered pumped hydro storage project the utility says will bring its total resource mix above 80% renewables.
The West Kauai Energy Project could come online in 2024. A solar array will be capable of sending 35 MW directly to the island's grid and an associated battery will store up to 240 MWh for dispatch during evening peak. The hydro resources are expected to produce 24 MW on average daily, including 12 hours of storage to be used overnight.    The project will meet about 25% of the island's electricity needs and puts it on track to exceed the utility's target of reaching 70% renewable generation by 2030. - Utility Dive

The climate crisis continued unabated in 2020, with the joint highest global temperatures on record, alarming heat and record wildfires in the Arctic, and a record 29 tropical storms in the Atlantic. Despite a 7% fall in fossil fuel burning due to coronavirus lockdowns, heat-trapping carbon dioxide continued to build up in the atmosphere, also setting a new record. The average surface temperature across the planet in 2020 was 1.25C higher than in the pre-industrial period of 1850-1900, dangerously close to the 1.5C target set by the world’s nations to avoid the worst impacts. - Guardian

Sugar cane contains around 10% sugar and around 90% non-sugar, the material known as bagasse which remains once the cane has been pulverised and the sugar-bearing juice squeezed out of it. World production of cane sugar was 185m tonnes in 2017. That results in a lot of bagasse which at the moment is often burned. Often, it fuels local generators that power the mills, so it is not wasted, but Zhu Hongli, a mechanical engineer at Northeastern University in Boston, thinks it can be put to better use. As she and her colleagues describe, with a bit of tweaking bagasse makes an excellent—and biodegradable—replacement for the plastic used for disposable food containers such as coffee cups. - Forbes and Northeastern University