Thing 1, thing 2,
and induced demand.
If you build thing 1 so that it enables more of thing 2 to happen, then it should not come as a surprise when more of thing 2 happens.
Now, if thing 2 *already* has a low* carbon and material footprint – like cycling – the induced demand is of low (not no) impact.
But if thing 2 is not low carbon, you’ve made cumulative overshoot *worse*
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*relative to its alternatives