Dan Hoornweg

Helping to create sustainable cities, one community, class, conference, and coffee at a time.

[Dan Hoornweg @UrbanScape]

@rgauder Hey good for you. Impressive. I have a jackery battery pack with two solar panels - works well in summer.

[Dan Hoornweg @UrbanScape]

The waste of COVID-19 | Nature Sustainability
My article on COVID-19 and waste management out today.

[The Economist @TheEconomist]

Why a dirty fuel remains stubbornly important on the continent https://t.co/REDxLNmq8b

[Ontario Tech University @ontariotech_u]

If you're at #CNA2025 this week, stop by booth 323/325 and learn how Ontario Tech is Canada's Nuclear Training Ground!

[Dan Hoornweg @UrbanScape]

CNA2025. Ontario Tech shines.

[Keeling_Curve @Keeling_curve]

429.00 parts per million (ppm) CO2 in air 22-Mar-2025
https://t.co/kUgI1WtcZU

[Keeling_Curve @Keeling_curve]

427.50 parts per million (ppm) CO2 in air 15-Mar-2025
https://t.co/kUgI1WtcZU

[Dan Hoornweg @UrbanScape]

Unfortunate that Canada does not have a city in the top 50. https://t.co/H2ZwPc2lsZ

[Dan Hoornweg @UrbanScape]

Ontario’s carbon intensity keeps rising.

[Dylan Reid @dylan_reid]

Useful chart from the Globe and Mail. While Americans are wealthier on average, average Canadians are wealthier (see what I did there ...) when one looks at median wealth.

[New Scientist @newscientist]

The Mauna Loa Observatory in Hawaii has recorded the biggest annual jump in atmospheric CO2 levels since measurements started there in 1958. https://t.co/17DzSmMMy6

[Dan Hoornweg @UrbanScape]

@elonmusk So too pollution and dangerous waste.

[Dan Hoornweg @UrbanScape]

Ontario Tech Energy Eng tour of Canada’s largest (combined) geothermal facility, and rooftop heat exchangers.

[Dan Hoornweg @UrbanScape]

Wow Ontario has low carbon electricity in the middle of the night.

[Dan Hoornweg @UrbanScape]

A hot day with higher demand in Ontario. Little wind and solar (and some nuclear offline) so unfortunately we are stuck with burning gas, and breaching the low-carbon limit of 100g.

[Dan Hoornweg @UrbanScape]

On the longest day of the year - showing Canada's warming climate stripes. We and the world warmer than anytime over the last 125,000 years and increasing quickly.

[Dan Hoornweg @UrbanScape]

The bright side of hope. https://t.co/QrjwuRG0DV

[Dan Hoornweg @UrbanScape]

Arguing a very bright future. https://t.co/rSqKC91QQ3

[Dan Hoornweg @UrbanScape]

As Ontario gets hotter and AC increases, much higher demands for electricity (and more gas increases our carbon emissions). Heat pumps would help (as well as lower emissions in winter).

[Councillor Derek Giberson @DerekGiberson]

Register quick! June 10th is the last day to get in