See https://conda.io/docs/user-guide/tasks/manage-environments.html

spec-file_3point6_lagranto.txt
#############################################################################################
#You can use explicit specification files to build an identical conda environment on the same
 #operating system platform, either on the same machine or on a different machine.
 #An explicit spec file is not usually cross platform, and therefore has a comment at the top 
 #such as # platform: osx-64 showing the platform where it was created. This platform is the 
 #one where this spec file is known to work. On other platforms, the packages specified might 
 #not be available or dependencies might be missing for some of the key packages already in the spec.
 #Conda does not check architecture or dependencies when installing from a spec file. To ensure
 #that the packages work correctly, make sure that the file was created from a working environment,
 #and use it on the same architecture, operating system and platform, such as linux-64 or osx-64.

#To use the spec file to create an identical environment on the same machine or another machine:
conda create --name myenv --file spec-file.txt

#To use the spec file to install its listed packages into an existing environment:
conda install --name myenv --file spec-file.txt

3point6_lagranto.yml
##############################################################################################
#Creating an environment from an environment.yml file
 #You may want to share your environment with someone else—for example, so they can re-create a test
 #that you have done. To allow them to quickly reproduce your environment, with all of its packages 
 #and versions, give them a copy of your environment.yml file.

#Create the environment from the environment.yml file:
#conda env create -f environment.yml