With land scarce, green space is being built into needs like transit hubs and power stations. But the projects come with challenges.

Source: City Parks Piggyback on Infrastructure – The New York Times

Further to green rooves

Green roofs can save energy, reduce air pollution and attract residents with their appealing look. Now, cities worldwide are enshrining them into law.

Source: The Green Revolution Spreading Across Our Rooftops – The New York Times

previously: California officially becomes first state to require solar panels on new homes

Source: NASA to proceed with asteroid surveillance mission – Spaceflight Now

After years of studies, NASA plans to move forward with a space-based telescope that could launch as soon as 2025 to scan the solar system for asteroids that could be on a collision course with Earth.

The US Department of Energy has formally announced the preparation of an environmental impact statement for the construction of a Versatile Test Reactor to test fuels and materials for use in advanced civilian nuclear power reactors.

Source: EIS process launched for US fast neutron reactor – World Nuclear News

https://arstechnica.com/science/2019/07/nasa-agrees-to-work-with-spacex-on-orbital-refueling-technology/

The Economist | Call him Ishmael https://www.economist.com/books-and-arts/2019/07/20/born-200-years-ago-herman-melville-was-globalisations-first-great-bard?frsc=dg%7Ce

Herman Melville, who was born 200 years ago, was globalisation’s first great bard

Researchers at Stanford and TUM claim excess renewable energy could be used to make zero-emissions hydrogen at a profit in the right circumstances. They expect the process will get less costly once the technology ramps up.

Source: Stanford Study Examines Hydrogen As A Commercially Viable Storage Medium For Renewable Energy | CleanTechnica

Why the space agency struggles to achieve its human spaceflight goals

Source: Apollo was NASA’s biggest win — but its legacy is holding the agency back – The Verge

“There has to be a better way of doing things. And I think I’ve found it.”

Source: Buzz Aldrin is looking forward, not back—and he has a plan to bring NASA along | Ars Technica

Source: It’s Time for a Modern Synthesis Kernel – Embedded in Academia

Alexia Massalin’s 1992 PhD thesis has long been one of my favorites. It promotes the view that operating systems can be much more efficient than then-current operating systems via runtime code generation, lock-free synchronization, and fine-grained scheduling. In this piece we’ll only look at runtime code generation, which can be cleanly separated from the other aspects of this work.