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Climate change evidence and causes: how do we know?
We know the climate is changing because three kinds of evidence agree. Thermometers show 2011–2020 was about 1.1 °C warmer than 1850–1900....
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Geography
Climate change evidence and causes: how do we know?
We know the climate is changing because three kinds of evidence agree. Thermometers show 2011–2020 was about 1.1 °C warmer than 1850–1900....
Maths
Consistent and inconsistent equations: the ratio test
A pair of linear (straight-line) equations is consistent if it has at least one solution, and inconsistent if it has none. Compare a₁/a₂ w...
System Design
Connection Pooling Explained: Reuse Database Connections
Connection pooling means an app opens a few database connections once, keeps them open, and lends one to each request that needs it. When ...