World leaders have started to generate some real optimism with their efforts to address global climate change. What’s troubling, though, is how far we remain from getting carbon emissions under control — and how much wishful thinking is still required to believe we can do so. The Paris agreement on climate change has garnered the national signatories needed to …

  The anonymity of bitcoin gained it myriad adherents among anarchists and drug dealers around the world. Now, though, it’s looking like the digital currency isn’t quite anonymous enough. Consider the sudden popularity of Zcash and Monero, two new cryptocurrencies that offer confidential transactions. When Zcash first became available last week, demand was so strong that its founders temporarily became …

  Bloomberg The green-energy industry is starting to feel the impact of an efficiency drive sweeping Asia, where governments from China to Japan are scaling back subsidies to constrain a boom in installations. Investment in clean-power technologies in Asia slumped 41 percent to $70.1 billion in the first nine months of the year, according to Bloomberg New Energy Finance, which …