Q: I’ve seen fashion designers promoting clothing based on kente cloth from Ghana. Is it insensitive for non-Ghanaians to wear it? —Lilia Morris | New York City Colorful kente cloth—made of ...

Why can’t machines process CO2 the way trees do? Tom Brewer | Ponder, Texas There are machines that absorb CO2, but they do it differently from trees. When plants perform photosynthesis, the ...