Add spaces: Severaloftheproposedlubricantscontainsubstancesforwhichnoorverylimiteddataonpotentialhealthandenvironmentaleffectscouldberetrieved.

Answer: Several of the proposed lubricants contain substances for which no or very limited data on potential health and environmental effects could be retrieved.
Electricmotorscandrivebasicallyeverywhere-buttheyarelessinwaterswithstrongcurrents,becauseinanemergency(zB.Transportship)cannotescapefastenoughagainstthecurrent.

Electric motors can drive basically everywhere - but they are less in waters with strong currents, because in an emergency (zB. Transport ship) can not escape fast enough against the current.
[Q]: [WhiletherehetookacoursegivenbyCremonaandthisturnedhimtostudypuremathematics.]
[A]: [While there he took a course given by Cremona and this turned him to study pure mathematics.]
Problem: Add spaces: Stockpiles,wasteandcontaminatedsitesPCBinbuildingmaterialsinolderbuildings.

Spaces added: Stockpiles, waste and contaminated sites PCB in building materials in older buildings.
This text is missing some spaces, please add them: RelegatingwomentoaninferiorstatuswasaprimaryfactorinEarth'sspiralingdownfromfifthdensitytodeepthirdandstayingstuckthere.
Relegating women to an inferior status was a primary factor in Earth's spiraling down from fifth density to deep third and staying stuck there.
[Q]: [Severaloftheproposedlubricantscontainsubstancesforwhichnoorverylimiteddataonpotentialhealthandenvironmentaleffectscouldberetrieved.]
[A]:
[Several of the proposed lubricants contain substances for which no or very limited data on potential health and environmental effects could be retrieved.]