Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow . Usually after several hard frosts, we get a break from cockroach surprises in the kitchen. So I was surprised when a huge palmetto bug ran across the pantry shelf last week. But it could have been worse. As plant growth surged during the Carboniferous era, the percentage of oxygen in the atmosphere reached 35% compared with 21% today. Insects rely on passive movement of atmospheric gases through openings in their