What is a good topic sentence for geography and climate?

I don't know exactly what area you're asking this for, but! Here's a couple of examples:

- The geography and climate of our Earth varies greatly ...

- The geography of Canada is fairly mountainous, with valleys and rivers, and a fairly average climate. However, if you travelled to, say, Africa there would be definite climactic and geographic differences.

- While the geography of one country varies from another, the climate could be similar, or even vice versa ...