Black carbon (BC), a component of soot, is a potent climate- forcing agent and has been estimated to be the second largest contributor to global warming after carbon dioxide (CO2). Thus, addressing BC emissions should be considered an essential element of any global warming mitigation strategy.
Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations.
With companies cutting production globally, carbon emissions are down, and so is the demand for certified emission reductions (CERs) or carbon credits. This has led to the price of carbon credits crashing from E25 in September to E15 last week.
