Range of carbon dating
Zimmer said that Lyft and 3Degrees are making sure they select meaningful, high-impact projects that need their backing in order to cut emissions.
But while the difficulties of single life may be intractable, the challenge of determining the age of prehistoric artifacts and fossils is greatly aided by measuring certain radioactive isotopes.
Until this century, relative dating was the only technique for identifying the age of a truly ancient object.
An auto parts supplier in Michigan and Ontario will switch its process to use a more expensive gas, which offers vast emissions improvements over a cheaper gas.
According to Barbara Haya, a research fellow at the California Institute for Energy and Environment, stricter standards are needed to evaluate the quality of projects than are currently being used.
Samples from the past 70,000 years made of wood, charcoal, peat, bone, antler or one of many other carbonates may be dated using this technique.
Researchers have found a reason for the puzzling survival of soft tissue and collagen in dinosaur bones - the bones are younger than anyone ever guessed.After death the amount of carbon-14 in the organic specimen decreases very regularly as the molecules decay.Carbon-14 has a half-life of 5,730 ± 40 years, meaning that every 5,700 years or so the object loses half its carbon-14.Since dinosaurs are thought to be over 65 million years old, the news is stunning - and more than some can tolerate.After the AOGS-AGU conference in Singapore, the abstract was removed from the conference website by two chairmen because they could not accept the findings.Its biggest competitor, Uber, has endured a series of scandals.