Futures dropped as much as 1.2 percent in London, extending Monday’s decline. Uncertainty over the outcome of Thursday’s meeting is creating the risk of a slide in prices, which have gained on assumptions that the curbs will be prolonged for nine months, according to Goldman Sachs Group Inc. OPEC backs such an extension but is still waiting for commitments from Russia, according to people familiar with the matter. Crude surged earlier this month on signs the Organization of Petroleum Exporting Countries and its partners will prolong cuts aimed at shrinking a global glut. Prices, time spreads and hedge-fund positioning all reflect a high probability the group will follow a Saudi proposal to extend the pact to the end of 2018, Goldman said. Yet Saudi Energy Minister Khalid Al-Falih said Tuesday that it’s too early to talk about the duration. Click Read More below for additional information.

Carbon aerogels are ultralight, conductive materials, which are extensively investigated for applications in supercapacitor electrodes in electrical cars and cell phones. Chinese scientists have now found a way to make these electrodes sustainably. The aerogels can be obtained directly from cellulose nanofibrils, the abundant cell-wall material in wood, finds the study reported in the journal Angewandte Chemie. Supercapacitors are capacitors that can take up and release a very large amount of energy in a very short time. Key requirements for supercapacitor electrodes are a large surface area and conductivity, combined with a simple production method. Another growing issue in supercapacitor production—mainly for smartphone and electric car technologies—is sustainability. However, sustainable and economical production of carbon aerogels as supercapacitor electrode materials is possible, propose Shu-Hong Yu and colleagues from the University of Science and Technology of China, Hefei, China. Click Read More below for additional information.