City Comptroller Brad Lander no doubt thought he was helping the climate war (and scoring points with warriors) when he boasted of his “dashboard” on climate progress last week, in advance of Saturday’s celebration of Earth Day.

Instead, he wound up exposing the utter folly of New York’s pricey efforts to lower Earth’s temperature.

Start with Lander’s revelation that the city’s reliance on fossil fuels for power has grown since 2019 — from 75% to 89%.

That’s largely thanks to the closure of the Indian Point nuclear plant, which accounted for 25% of the city’s juice.

The city plans to make up for that by expanding solar, with 72 megawatts installed last year, putting Gotham on pace to meet its 2030 goal.

Yet that goal,1,000 MW, is just half of the 2,000 MW Indian Point could put out.

And just a fraction of the 13,000 MW the city needs.

Lander’s term for the goal, “modest,” is the understatement of the century. (And Indian Point didn’t need cloudless skies to generate power.)

There’s more: The city is “committed” to limiting its greenhouse-gas emissions to 12 metric tons a year, an 80% cut by 2050, the dashboard notes.

Yet over the decade since 2011, it brought them down by less than 4%, to 53.9 metric tons in 2021.

And added cuts will only get harder as low-hanging fruit vanishes.

Lander’s dashboard also brags of a $3.8 billion divestment from fossil fuels, in pursuit of “net zero greenhouse gas emissions,” by companies in the city’s pension funds by 2040.

Yet divesting from an entire economic sector will inevitably narrow the funds’ diversity, boost risks and preclude the opportunity for greater returns. (Remember: Taxpayers must make up any pension-fund shortfalls.)

And the greenies continue to demand ever more pain, including a push for all-electric buildings that’ll require vast infrastructure upgrades — and spell the end of gas stoves — without actually reducing emissions, since fossil fuels still generate the most electricity.

Meanwhile, the left’s Climate Change Superfund Act aims to make fossil-fuel companies pay for their past, perfectly legal business operations.

If it actually became law and survived court challenges, it might help cover the monster tab — as much as a half trillion dollars — of meeting the state’s emission goals.

Then again, New York consumers would get socked with hefty new costs as the firms pass along that charge.

And the big picture is all about futility: Even if the city and state somehow meet their goals (at enormous pain and expense), it won’t budge global temps one bit, especially as nations like China and India continue to increase their greenhouse-gas output.

Yet if the entire world stopped doing anything more to combat it, climate change would still have a negligible impact on worldwide GDP by 2100, per the UN’s own climate-change panel.

Lander’s inadvertent admission about the failures of the city’s climate agenda, in short, is just a case study of the futility of the entire global campaign.