To me, mathematics is like playing the violin. Some people can do it - others can't. If you don't have it, then there's no point in pretending.
Freeman DysonThe fundamental reason why carbon dioxide in the atmosphere is critically important to biology is that there is so little of it. A field of corn growing in full sunlight in the middle of the day uses up all the carbon dioxide within a meter of the ground in about five minutes. If the air were not constantly stirred by convection currents and winds, the corn would stop growing.
Freeman Dyson