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1. To opinions! Solar is the cheapest source of bulk electricity in many countries, and the quickest to deploy, and now you couldn't stop it being built if you wanted to. The limits to PV build in most places are grid access, permitting, and sometimes installation labour.

2. Nearly 20 years ago when I got this job, I thought maybe solar would one day be 1% of global electricity supply. Last year it was 6% worldwide, and rising fast.