1-C. However, citizen science projects are burgeoning more than ever: over 60 of them were mentioned at a meeting of the Ecological Society of America not long ago.However, citizen science projects are burgeoning more than ever: over 60 of them were mentioned at a meeting of the Ecological Society of America not long ago.
2-C. Forest destruction is not only an ecological problem, but it also has a serious economic effect.Forest destruction is not only an ecological problem, but it also has a serious economic effect.