#hydrocarbons — Public Fediverse posts

Had #MOT (compulsory #vehicle inspection) for #GolfGTI this week (first one since I got it last year)

Took slightly longer than my previous #cars - there are twin exhausts and both must be tested!

Passed with 0 advisories and very good emissions test - only 18ppm of #hydrocarbons which is very good as it means #petrol is being used as much as possible to power the engine rather than going out of exhaust unburned - just as well with price of the stuff at the moment (as well as #environment impact!)

I fitted new #sparkplugs last November, replaced the air filter and did oil service which looks like it has paid off - am going for 6 month oil changes as widely recommended for #EA888 engine ( helps keep timing chain in good condition longer)

A Crew Was Searching For Shipwrecks In Lake Michigan—But They Found Something Completely Different
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https://www.popularmechanics.com/science/environment/a62501711/lake-michigan-holes/ <-- shared media / technical article
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“ • A survey of Lake Michigan located at least 40 large craters on the lakebed.
• Initial studies highlighted the spots as unknown shapes, but additional research revealed the craters are filled with marine life.
• Researchers expect to investigate further, seeing how these craters formed and if they’re really sinkholes…"
#GIS #spatial #mapping #water #hydrology #groundwater #crater #sinkhole #bathymetry #topobathy #remotesensing #sonar #LakeMichigan #Michigan #research #GreatLakes #geomorphology #geomorphometry #ROV #ecology #ecosystems #cyanobacteria #WisconsinShipwreckCoastNationalMarineSanctuary #Sheboygan #Wisconsin #extremeecosystems #extremophiles #offgassing #hydrocarbons
@NOAA