I think the tariffs the USA are implementing are fair, most of the world just sees America as a place to try and suck money from.
China subsidies everything from electricity to steel, it even has multiple forms of its own currency to buffer it from the rest of the world with CNH and CNY, one is for offshore and one is for internal usage only, they serve as a gateway buffer between the rest of the world.
https://www.quora.com/What-is-the-difference-between-CNY-and-CNH-currencies
Prior to the establishment of the yuan offshore market, China's capital control rules did not allow renminbi (denoted CNY) to be traded outside of China.
But what it causes is everything to be only affordable if you buy it in China for Chinese locals, because if you had to buy carrots from the USA using Chinas internal currency it would be like $100 per carrot. This is a country-wide incentive to make and sell everything internal within China only.
It also makes selling stuff overseas to the USA become 100 times more valuable worth once the money comes into China.
So making/selling solar panels in China from entirely subsidized materials, with subsidized coal, electricity and buffered money makes it all a one direction trading policy.
The other part of it is China doesn't respect environmental laws, the semiconductor production part of all solar panels (solar panels are mostly just silicon semiconductors that absorb light) releases gases like NF3 and SF6 as stated by the EPA. China just lets the gases spew into the atmosphere in their production process as its the cheapest way to make solar panels and is giving them just more of a competitive edge.
https://www.epa.gov/f-gas-partnership-programs/semiconductor-industry
Semiconductor manufacturing processes use high GWP fluorinated compounds including perfluorocarbons (e.g., CF4, C2F6 and C3F8), hydrofluorocarbons (CHF3, CH3F and CH2F2), nitrogen trifluoride (NF3) and sulfur hexafluoride (SF6).
China even sell these super greenhouse gases by the ton, for anyone to buy.
https://www.alibaba.com/product-detail/Nitrogen-Trifluoride-NF3-Gas_60547172339.html?spm=a2700.7724857.2017115.102.423563abjlt9Xv
I posted details about it all here https://endless-sphere.com/forums/viewtopic.php?f=7&t=89002&start=1600#p1359259
These super potent greenhouse gases completely blow away CO2 and stay in the atmosphere for 1000's of years. Plenty of experts claim the manufacture of solar panels are doing far more damage to the environment than they prevent, buying those made in China is just making the problem much worse.
https://youtu.be/v6uVnyjTb58?t=12m47s
https://en.wikipedia.org/wiki/Nitrogen_trifluoride#Greenhouse_gas
Quote from Wikipedia
"NF3 is a greenhouse gas, with a global warming potential (GWP) 17,200 times greater than that of CO2 ...
large-scale production of thin-film solar cells."
If we take the 17,200 x greater than co2 and times it by 8,000tons we get 137,600,000 co2 equivalent CO2e.
With SF6 is 23,900 greater than co2 warming equivalent and at an estimated 10,000tons a year 23,900x10,000 = 239,000,000 co2e.
239million tons of co2 equivalent while Australia's coal power-stations only emit around 151million tons a year
A lot of the charts are updated daily on NOAA
https://www.esrl.noaa.gov/gmd/dv/iadv/graph.php?code=WGC&program=hats&type=ts
Only reason this information is not mainstream is due to the fact its too complicated to explain in mainstream media and also because of the fact Solar is pushed around for political power and money then anything else. Planting trees doesn't really make anyone money nor does it sell well as an environmental solution in politics.