I kind of forgot about Cramer being optimistic about this stock years back.
This company has a huge presence in Europe, something that needs to be paid attention to. They're also working with the biggest diesel engine manufacturer in China, another huge plus. As you've also stated India, Tata Motors, could come on line any day.
I also think the price of Diesel could change buyers minds over to NatGas. Plus the incentives / credits in using RNG. Just seems everything is coming together for this company.