The co-authors say the Paris Agreement strengthens competitiveness by ensuring a more balanced global climate effort and will reduce future climate impacts, including damage to business facilities and operations, declining agricultural productivity and water supplies and disruption of global supply chains.
During his election campaign Trump promised to "cancel" the climate deal, clinched in 2015 after years of tough bartering and now signed by 196 countries.
The Paris accord calls for limiting the global average temperature increase since the industrial revolution to 2 degrees Celsius (3.6 degrees Fahrenheit) or less - a goal that has been called ambitious.
"It would be hard, crazy, to go against public opinion, against the domestic will, and the will of the worldwide community", Mezoua said in Bonn.
But the White House said no decision would be announced until after Trump returns from the G7 summit of leaders from the world's leading economies at the end of May in Sicily. Shultz and Halstead say that a USA withdrawal from the Paris deal would cloud the global business climate.
But the negotiations risk being overshadowed by fears that the world's number two carbon polluter will withdraw and throw the entire process into disarray. Delegation head Trigg Talley, who represented the USA under Obama, declined to answer questions on the team's new brief.
White House advisers have postponed a crucial meeting on the Paris climate agreement as the Trump White House has yet to confirm where they stand on the accord.More news: Hosts Japan may face All Blacks at 2019 Rugby World Cup
"The president wants to continue to meet with his team", Spicer said, and come up with a decision "in the best interest of the United States".
Officials are working over 10 days of talks in Bonn to see how to implement the agreement in order to cut carbon emissions.
At an open session late Monday, speaker after speaker reiterated the deal must not be "renegotiated" - a proposal of Trump's Energy Secretary Rick Perry.
However, Mr Trump signalled he was not going to let worldwide climate change targets and regulations agreed to by his predecessor stand in his way of creating jobs for Americans.
Many nations want Trump to remain in the agreement, which is meant to rein in rising world temperatures by shifting towards cleaner energies such as wind and solar power, even though he plans to bolster the USA coal industry.
It was not clear to what extent the U.S. team was actively taking part in the latest talks.
"It is definitely the elephant in the room", a member of one national delegation told AFP on Tuesday.