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Issue title: "How is crypto mining improving the energy grid?"

This issue was released September 15th, 2021.

The cover art is a custom piece by Mark Hopkins featuring Norwegian billionaire and bitcoiner Kjell Inge Røkke.

From this issue: "In our ongoing series about mining and consensus mechanisms, we examine exactly what the impact on climate and energy grids mining has."

Other headlines in this issue:

• Coinbase threatens to sue SEC over crypto lending program.
• Mastercard acquires crypto tracking firm CipherTrace.
• El Salvador buys 400 BTC as Bitcoin becomes legal tender.

Original reporting in this issue:

• Algorand Foundation puts $300M fund behind growing DeFi innovation.
• Ukraine becomes the latest country to legalize Bitcoin.

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