The nitrogen cycle is essential to life on Earth, but biological nitrogen must be fixed before it can be used. Scientists aren't sure how the first nitrogen became available... but it might have been volcanoes.

We just finished looking at some catalytic hydrogenation reactions, so let's look at another extremely important application of hydrogen gas. Ammonia is a critically important compound for many reasons, particularly fertilizer production...

The video is a lecture presentation about the nitrogen cycle and how the essential element is continuously recycled in nature. The speaker first explains the concept of cycles in general and why they are necessary due to the finite...

In this section, I talk about the sun as a source of energy, consumers vs. producers and cycles found in nature